madersex.com is available

1. The domain is available

The domain madersex.com is available, this means that anybody can register the domain at this time. There may be plenty of reasons why this domain is not registered such as:

The domain was never registered before

The domain has expired and the previous owner didn't want to renew

The domain has expired and the previous owner forgot to renew

The previous owner deleted his domain reigstration

2. How do I register a domain name?

There are many websites available through which you can register your domain name. A business offering domain name registration is called a 'registrar'.
They allow you to search to see if the domain you would like is available. As the domain is no longer the property of someone else, you can register as of now with your favorite domain registrar.
Here's a list of the most popular domain registrars:

3. What does it mean to let a domain expire?

When you register a domain name it is for a set period (atleast 1 year). This means that the domain is not necessarily yours forever but atleast for the year to come.
Unless you renew your registration when it is due to expire, your website will become unavailable and any related email addresses will stop functioning.

There is always a grace period before the domain becomes publicly available again, so if you do accidentally let it expire you can usually reactivate it.
However, if you leave it for too long there is always the chance that someone else will register the domain instead, making it unavailable to you.